import requests
from bs4 import BeautifulSoup
def scrawler(url,selector)
    url="https://jos.org.cn/jos/article/issue/2024_35_9"
    headers ={
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36 Edg/114.0.1823.41'}
    r=request